EP0263105A1 - Automatically acting, lockable hoisting block. - Google Patents
Automatically acting, lockable hoisting block.Info
- Publication number
- EP0263105A1 EP0263105A1 EP86903679A EP86903679A EP0263105A1 EP 0263105 A1 EP0263105 A1 EP 0263105A1 EP 86903679 A EP86903679 A EP 86903679A EP 86903679 A EP86903679 A EP 86903679A EP 0263105 A1 EP0263105 A1 EP 0263105A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- block
- plunger
- seat
- hoisting
- hoisting member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
- B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
- B66D3/10—Applications of braking or detent devices
Definitions
- the present invention relates to an automatically acting, loc able hoisting block for automatically and/or manually locking a lifting member running through it, the block being intended to be disposed in any attitude in relation to the load to be lifted with the aid of the lifting member.
- the lifting means includes a saddle member, which has in cross section a V-shaped groove in which the lifting rope is intended to run.
- the shape of the groove causes it to engage against the rope to avoid the rope slipping.
- This arrangement has the re- suit that the block is very difficult to adjust in relation to the rope, and several adjustments of rope to block will be necessary before hoisting may be per ⁇ formed.
- both rope parts must be loaded for the rope to become locked.
- the object of the present invention is to provide a hoisting block not having the drawbacks mentioned and which, with automatic and/or manual action, is lock- able in an adjustable position in any attitude in relation to the load to be hoisted.
- hoisting may also take place even when the load is not in a position of equilibrium, and when the different parts of the hoisting member are unequally loaded. This also means that one of the parts can be completely unloaded during hoisting with the inventive block.
- Figure 1 is a schematic elevation of a first embodiment of the inventive hoisting block, with a frontcover removed,
- Figure 2 is a cross section through the block of Figure 1 ,
- Figure 3 is a schematic elevation of a second embodiment of the hoisting block in accordance with the present invention with the front cover removed.
- FIG. 1 A first embodiment of an inventive hoisting block is illustrated in Figure 1 , the block being intended for ' coupling to an unillustrated hook on a hoisting crane or any other hoisting means.
- the inventive block 1 comprises a main block 2 with an associated cover 3, the function of which will be explained later.
- the main block 2 is configurated in its cross section as
- SUBSTITUTE SHEEI a substantially U-shaped part with horizontal legs between which there is formed a recess or opening 4 for accommodating the mechanism locking a cable, rope, band, chain or any other hoisting member.
- a pair of lugs 5 or the like, attached to the block 2 form fulcra for arms 6,7 which are turnable relative the block.
- the lugs 5 engage in recesses, not shown in more detail, in the arms 6,7. Since the arms are alike, the description of them will be confined to the right arm in Figure 1.
- the arm 7 has an elongate curved configuration in a vertical plane, and is pro ⁇ vided with bearing surface 8 in its longitudial direc ⁇ tion.
- a rope, band or similar hoisting member 30 can run freely over the surface 8, which in its transverse direction is defined by projection flanges or the like forming walls on the arm.
- the bearing surface may have in cross, section a curved shape of any radius of curvature. What is essential is that the hoisting member does not slip out of the arm in case of a skew hoist. It is also conceivable within the scope of the invention to make the surface 8 entirely flat when the hoisting member has the shape of a wide, flat band or belt.
- the arm 7 van thus form a saddle-shaped support for the rope 30 running between the block 1 and the load.
- the end 9 of the arm 7 in the vicinity of the lug 5 is in contact via a shoulder 10 with the inner side 11 of a support 13 associated with a plunger 12.
- the upper side of the plunger 12 which has a curved configuration, has a bearing surface 14 of approxi ⁇ mately the same configuration as that of the bearing surface 8, and which is substantially a continuation of the bearing surface 8 of the respective arm, thus bridging between the bearing surfaces of the two arms.
- the lower portion of the plunger 12 is provided with downwardly tapering guide lugs 15,16, between which there are arranged conical locking members 17,18 for
- SUBSTITUTE SHEET manually locking the hoisting member.
- These locking members 17,18 are displaceable to and from each other in a horizontal plane with the aid of a bolt 19, not illustrated in more detail.
- the " arms are thus allowed to pivot freely about their respective lugs 5 in mutual independence.
- the downwardly tapering shape of the guide lugs and the conical shape of the locking members ensures that the plunger cannot bind against the lockingmembers.
- Above the plunger 12 there is a seat 20 movably disposed in the block.
- the seat downwardly has a concave surface, seen from below, which in its longitudinal direction is provided with an open bearing surface or a groove 21.
- the surface 21 of the seat 20 forms a common groove together with the plunger bearing surface 14 in which the hoisting member 30 may be locked.
- the groove commonly formed by the bearing surface 14 and the bearing surface 21 serves to accomodate a rope, chain or the like hoisting member.
- the common groove forms a larger part of the opening or recess 4, defined by the vertical walls of the block and the respective surface on the plunger and seat. Since the surfaces 14,21 are substantially flat, the entire surfaces of the plunger and seat engage against the band in question.
- the seat is upwardly provided with guide lugs 22 which are engaged with the block via compression springs 23 or the like via recesses 24 made in it.
- the guide lugs 22 may be given any configuration, e.g. a dovetail shape, so that they engage with some play in the upper portion of the block to retain the seat in it. In its longitu- .• dial direction the seat extends to advantage somewhat outside the plunger 12 so that its end groove is above
- the block may be equipped with plungers of varying dimensions to suit different hoisting members.
- the spacing between plunger and seat should have dimen ⁇ sions such that a heavy chain can also find room.
- a cover 3, provided with a plurality of locating bosses 25 (four in the Figure) or the like is fitted with not shown fastening means to the block with the aid of complementary recesses 26. The cover contributes in distributing more uniformly over the block the forces occurring during hoisting.
- Each arm 6,7 may be provided at its outer free end with a stirrup 27 for a hook or the like.
- the main block may also be formed with a stirrup means 28 for hoisting hook.
- each arm may be covered by a casing or the like, fastened to the block for protecting the upper side of the arm and the hoisting member as well as the plunger and seat.
- the hoisting member 30 is attached at one or preferably both ends to a load which is to be hoisted, and the member is allowed to run through the block so that it rests in the channels of the arms 6,7 and the grooves of the plunger 12, at the same time running in the groove commonly formed between the plunger 12 and seat 20.
- the block is raised, one or both of the arms 6,'7 will pivot under the action of the hoisting member and the load about the lugs 5, the arm 6 turning in a counter-clockwise direction and arm 7 in a clockwise direction in the example illustrated in Figure 1. Whether just one or both arms actuate the plunger locking
- SUBSTITUTE SHEET movement against the seat depends on the position of the block in relation to the hoisting member and also on whether just one or both ends of the hoisting member take up the load.
- the member When the block is close to one end of the member, i.e. near the load which is to be lifted, the member will be locked in the block between the plunger and the seat under the action of only one of the arms. In certain cases it may be advantageous to hoist the load in this way. If another position of the block in relation to the hoisting member and load is desired the block may be pushed manually along the member, for hoisting once again.
- Essential to the hoisting block in accordance with the invention is thus that locking the hoisting member takes place just as effectively with one arm activated or both arms simultaneously.
- the plunger 12 and the section of the hoisting member on it are forced to move upwards against the spring biassed seat 20 so that the member is locked in the groove formed between the plunger and seat.
- the groove may advantageously be formed so that it functions as a supplementary lock, e.g. it could be made slightly conical.
- the load may now be hoisted without fear of the hoisting member slipping. As already mentioned, in some cases it may be desirable that a load has a certain inclination when it is to be hoisted.
- the inventive hoisting block is allowed to run along the hoisting member up to the point where hoisting is performed most advantageously.
- the block is locked in this position in the same way as described above as soon as one of the hoisting member parts has been stretched. It is also possible to lock the block manually with the locking members 17,18 by moving them towards each other by turning the left- and right- hand threaded bolt 19.
- the locking members can also act as an extra safety lock working with the automatic lock, the plunger 12 being locked by the locking mem ⁇ bers 17,18 after having been moved to the position in which it is to be locked.
- Compression springs 29 may be arranged between the arms 6,7 and the main block 2, whereby the sliding ability of the block along the hoisting member 30 may be regulated.
- this block 3 is also self-adjusting in relation to an optional type of hoisting member, inasmuch as it can be moved to a position best suited to the load hoisted.
- this e odiment includes a plunger actuable by a manual locking mechanism 32.
- both arms 34,35 are firmly fixed to the main block 36, thus forming one common unit.
- the arms 34,35 are provided with elon ⁇ gate bearing surfaces 37,38 similar to those described in connection with Figures 1 and 2, for supporting a suitable hoisting member.
- the plunger 33 is formed with a bearing surface 44 for the hoisting member and under the action of the manual locking mechanism 32 it is movable downwards towards a seat 39, this also being provided with a bearing surface 40 similar to the previously described surface 21.
- the manually operated locking mechanism comprises two locking members 42,43, which are displace ⁇ able from and to each other in a horizontal plane under the action of a left- and right-hand threaded bolt 41. Locking a hoisting member running freely through the block is achieved manually by the locking members being urged towards each other through the agency of the bolt 41 so that their sloping surfaces press the plunger 33 against the seat 39, the member
- the parts associated with the different blocks i.e. the plunger, seat and arms, may be manufactured as assemblable sets for different groove dimensions, thus enabling the use of hoisting members having diffe ⁇ rent dimensions. Exchanging such a set merely requires removal of the cover 3 to make the parts accessible. It is also conceivable to arrange several grooves in both plunger and seat, as well as several plunger sections connected to each other in memorir, i.e. sec ⁇ tions of a plunger that are arranged one after the other in the longitudinal direction of the hoisting member, where one or more of the sections may be disposed for actuating the pivotable arms and one section for the manual locking mechanism. By connection in series is also meant here plunger sections arranged one above the other, e.g. for several like or unlike hoisting members. It is also possible to arrange plunger sections lying parallel, i.e. arranged side by side transverse the longitudinal direction of the hoisting member.
- SUBSTITUTE SHEET hoisting block and arms may of course have different dimensions.
- the bearing surfaces of the seat 20 and the plunger 12 for the automatically lockable hoisting block as well as the bearing surfaces for the plunger 33 and seat for the manually lockable hoisting block may advatage- ously be provided with an antislip material to further improve the grip of the plunger and seat on the hoisting member. It is also conceivalbe to provide the arms with friction-increasing material of suitably restricted areas.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Special Chairs (AREA)
- Chairs Characterized By Structure (AREA)
- Supporting Of Heads In Record-Carrier Devices (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Bloc de levage pouvant être verrouillé automatiquement ou bien manuellement; ce bloc de levage peut se déplacer librement le long d'un membre de levage s'étendant entre la charge à lever et le bloc, jusqu'à ce qu'il soit dans la position désirée par rapport à la charge. Le bloc comprend un poussoir (12) qui peut être actionné par au moins un mécanisme de verrouillage (6,7), et une surface d'appui (20) située à proximité du poussoir; une partie du membre de levage (30) passe à travers une rainure formée conjointement par le poussoir et la surface d'appui et peut ainsi être bloquée entre ledit poussoir et ladite surface d'appui. Le levage peut donc être opéré indépendamment de la position du bloc par rapport au membre de levage et à la charge.Lifting block that can be locked automatically or manually; this lifting block can move freely along a lifting member extending between the load to be lifted and the block, until it is in the desired position relative to the load. The block comprises a pusher (12) which can be actuated by at least one locking mechanism (6,7), and a bearing surface (20) located near the pusher; a part of the lifting member (30) passes through a groove formed jointly by the pusher and the bearing surface and can thus be blocked between said pusher and said bearing surface. The lifting can therefore be operated independently of the position of the block relative to the lifting member and the load.
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86903679T ATE51850T1 (en) | 1985-06-05 | 1986-06-04 | AUTOMATIC LOCKING LIFTING BLOCK. |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8502782 | 1985-06-05 | ||
SE8502782A SE453588B (en) | 1985-06-05 | 1985-06-05 | AUTOMATIC OPERATING, LASABLE LIFT BLOCK |
JP12943/86 | 1986-01-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0263105A1 true EP0263105A1 (en) | 1988-04-13 |
EP0263105B1 EP0263105B1 (en) | 1990-04-11 |
Family
ID=20360459
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86903679A Expired EP0263105B1 (en) | 1985-06-05 | 1986-06-04 | Automatically acting, lockable hoisting block |
Country Status (6)
Country | Link |
---|---|
US (1) | US4728138A (en) |
EP (1) | EP0263105B1 (en) |
JP (1) | JPS61282295A (en) |
AU (1) | AU594962B2 (en) |
SE (1) | SE453588B (en) |
WO (1) | WO1986007343A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4934660A (en) * | 1987-10-02 | 1990-06-19 | D B Industries, Inc. | Device for raising and lowering loads |
US5309187A (en) * | 1992-03-18 | 1994-05-03 | Ocular Instruments, Inc. | High magnification ophthalmic lens |
US5435611A (en) * | 1994-07-11 | 1995-07-25 | Campbell; David K. | Aluminum can handling tongs |
US10414638B2 (en) * | 2013-12-30 | 2019-09-17 | Manitowoc Crane Companies, Llc | Lightweight flexible tensioning system for construction equipment |
US10221918B2 (en) * | 2015-06-27 | 2019-03-05 | Dark Canyon, Inc. | Rope tension device and method thereof |
US11870233B2 (en) * | 2019-04-20 | 2024-01-09 | Fritel & Associates, LLC | Mobile conductor lift |
CN110884991A (en) * | 2019-11-22 | 2020-03-17 | 一汽解放汽车有限公司 | Hoist and mount adjusting device convenient to assembly |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1389514A (en) * | 1921-05-31 | 1921-08-30 | Charles A Kestell | Automatic lock-pulley |
US1636273A (en) * | 1927-01-15 | 1927-07-19 | Arnold W Baker | Pulley block |
BE525812A (en) * | 1953-07-21 | |||
DK113240B (en) * | 1966-05-26 | 1969-03-03 | Lineta Ved N & P Rasmussen | Suspension clamp for cranes and similar lifting apparatus for connecting the support means of the lifting apparatus, for example a crane hook and a suspension means, such as a chain or wire. |
US4097083A (en) * | 1977-06-15 | 1978-06-27 | Roberton & Schwartz, Inc. | Adjustable lifting thimble |
JPS58152796A (en) * | 1982-03-08 | 1983-09-10 | 小林 利章 | Brake gear for manual hoist |
-
1985
- 1985-06-05 SE SE8502782A patent/SE453588B/en not_active IP Right Cessation
-
1986
- 1986-01-22 JP JP61012943A patent/JPS61282295A/en active Pending
- 1986-06-04 AU AU59584/86A patent/AU594962B2/en not_active Ceased
- 1986-06-04 WO PCT/SE1986/000259 patent/WO1986007343A1/en active IP Right Grant
- 1986-06-04 US US07/033,158 patent/US4728138A/en not_active Expired - Fee Related
- 1986-06-04 EP EP86903679A patent/EP0263105B1/en not_active Expired
Non-Patent Citations (1)
Title |
---|
See references of WO8607343A1 * |
Also Published As
Publication number | Publication date |
---|---|
JPS61282295A (en) | 1986-12-12 |
SE8502782L (en) | 1987-02-24 |
EP0263105B1 (en) | 1990-04-11 |
US4728138A (en) | 1988-03-01 |
SE8502782D0 (en) | 1985-06-05 |
AU5958486A (en) | 1987-01-07 |
AU594962B2 (en) | 1990-03-22 |
SE453588B (en) | 1988-02-15 |
WO1986007343A1 (en) | 1986-12-18 |
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